Home / 521.64-719.64-311.77

Finding the Fourth Proportional to 521.64, 719.64 and 311.77

Calculator

Solution

The fourth proportional to 521.64, 719.64 and 311.77 is: 430.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.64 : 719.64 = 311.77 : x
  2. Step 2: Convert to fraction form
    521.64/719.64 = 311.77/x
  3. Step 3: Cross multiply
    521.64x = 719.64 × 311.77
  4. Step 4: Simplify right side
    521.64x = 224,362.16
  5. Step 5: Solve for x
    x = 224,362.16/521.64
  6. Step 6: Final answer
    x = 430.11

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.